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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 9-10

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Authors: John A Ryder

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 79-86

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 92-110

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 111

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Authors: S B Buckley

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 121-122

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Authors: Henry C Chapman

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 126-148

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 149

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Authors: Angelo Heilprin

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 151-159

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 160

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 162

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Authors: Henry C Mccook

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 163-175

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 176

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Authors: Angelo Heilprin

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 416-422

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 429

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Authors: H C Wood

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 435-439

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 443

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Authors: Angelo Heilprin

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 448-453

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Authors: Edward Potts

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 460-463

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 472-485

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1881, in volume 33, pages 502-505

Created: 2013-03-02, modified: 2013-03-02